1. Aho A., Sethi R., Ullman, J. (1986). Compilers, Principles, Techniques and Tools,Addison Wesley.
2. Bikel D., Schwartz R., Weischedel R. (1999). An Algorithm That Learns What’s in a Name, Machine Learning: Special Issue on Natural Language Learning, 34, 211–231.
3. Brill E. (1994). Some advances in rule-based part of speech tagging, Proc. of AAAI-94 Conference, 722–727.
4. Brin S., Page L. (1998). The anatomy of a large-scale hypertextual Web search engine. Computer Networks and ISDN Systems, 30, 107–117.
5. Califf M.E. (1998). Relational Learning Techniques for Natural Language Information Extraction. Ph.D. Thesis, Department of Computer Sciences, University of Texas, Austin, TX.